public async Task <Stat.Types.State> ProcessJob(string opName)
        {
            // process operations
            //GetPipeline().ForEach(opName =>
            //{
            var newOp = opName;

            if (opName.Substring(0, 2).ToLower() == "up")
            {
                var isNumeric = int.TryParse(opName.Substring(2), out int n);
                if (isNumeric)
                {
                    // filter the following number after "up"
                    newOp          = "up";
                    _tk.CurSending = _tk.CurSending + Convert.ToUInt64(opName.Substring(2));
                }
            }
            var     tuple = OperationFactory.CreateOp(newOp, _tk);
            var     obj   = tuple.Item1;
            var     type  = tuple.Item2;
            dynamic op    = Convert.ChangeType(obj, type);
            await op.Do(_tk);

            //});

            return(_tk.State);
        }